Re: Hood Face Velocity

[John Pickering <johnjp@email.sjsu.edu>]

The requirement for face velocity is dependant on the agreement (license)
with the state.  If I recall, at USC, you WERE committed to 125 lfm.  The
standard is the average to be at least 100 lfm.  An Industrial Hygienst can
better advise the measurement technique.  While I was at USC we were
committed (on the main campus) to 125 lfm due to a license committement.
For a chemical hood the face velocity was 100 lfm and the biohoodw were 150
lfm.  

On the main campus there is a section in the Safety School which teaches IH.
They also have the calibration equipment for specific velometers (at last
check in 89).  

John Pickering, MS
johnjp@email.sjsu.edu


At 10:39 AM 11/7/97 -0600, you wrote:
>Our License requires fume hood face velocities to be greater than 125 
>LFM. In researching this number I have seen different figures quoted. 
>Does anyone have any input on this or know of any guidance on what 
>the velocity should be. Thanks.
>
>Chuck Pickering
>University of Southern California
>(213) 342-2200
>cpickering@engr-serv.usc.edu
>
>